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Whats the part number for the pipe plug that goes in the left side of the engine block with the hole for the accelerator return spring?

Do most vendors have this? I'm having a time tracking it down.

Thanks,

I am going to guess we are asking about an M38A1. Helps to ID your jeep or post it permanently in your signature element.

It's a plain steel 1.8"x27NPT pipe plug with the square head drilled for the spring. The original was uncoated plain steel and was superseded for service by a cad/zn plated one that came undrilled. The info is on page 35 of your M38A1 ORD 9.

Keep in mind when you install these plugs in the block you should use a good quality oil and gas resistant pipe thread sealer (not teflon tape) like Tite-Seal medium weight.

Thanks for the numbers and tips! Anyone know of a vendor with these? A quick search on those numbers didn't turn up anything. Was hoping to find NOS

You learn something new (or should learn something new) every day. I have been hooking the spring onto the plug without a hole. I just loop it over the whole plug.

Thanks Wes.

If its holding you up, just go buy a 1.8"x27NPT pipe plug, drill a hole and install. They are cheap. Later (if you remeber), look for a NOS.

I need the spring too. PO had something else rigged at the top of the engine block.

If there was a vendor with the plug, I was just going to throw it in with the spring order.

You now have all the numbers and descriptions so just email your needs to the main popular M jeep parts vendors. Start with the guys who try to stock parts for our M jeeps and then work out to the civvy vendors.

The fact that the military started superseding it around 1955 means the odds of finding an original NOS are very slim.

So if they started superceeding it that early, what is appropriate on a 1962 M170?

The safe assumption is Willys always installed the drilled pipe plug at the factory on the M38, M28A1 and M170. The Army supersedure in the catalog was simply a cost saving measure. Why buy a standard 1/8" pipe plug with a hole drilled in it and a Willys part number from Willys for $10 each when you can procure hundreds of standard 1/8" pipe plugs undrilled from a national or local hardware supplier for around $0.20 each? There's very little challenge or energy spent drilling the hole in the new standard plug!